Light bar



FIG. 1 is a perspective view of a light bar showing my new design;

FIG. 2 is a front view thereof, which is a mirror image of the rear view thereof;

FIG. 3 is a left side view, which is a mirror image of the right side view thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view thereof. 

CLAIM The ornamental design for a light bar, as shown. 